Auxiliary heater



June 23, 1925. 1,543,405

H. c. swENsoN AUXILIARY HEATER Filed Aug. 24. 1923 Patented `lune 23, 1925.

HERMAN C. SWENSON, OF HOUSTON, MINNESOTA.

AUXILIARY HEATER.

Application filed August 24, 1923. Serial No. 659,126.

To all whom t may concern.:

Be it known that I, HERMAN C. SWEN- SON, a citizen of the United States, residing at Houston, in the county of Winona and State of Minnesota, have invented certain new and useful Improvements in Auxiliary Heaters; and I do hereby declare the following to be a' full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make land use the; same.

My invention. has for its object to provide an extremely simple and highly ellicient auxiliary heater or heat arrestor as an attachment for stoves and the like for increasing the heating capacity thereof and conserving fuel.

To the above end, generally stated, the

invention consists of the novel devices and combinations of devicesr hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a right side elevation. of thev invention attached to a Stove;

Fig. 2 is a central vertical section of the same; and

Fig. 3 isa view partly in plan and partly in section, taken Substantially on the irregular line 3-3 of Fig. 2.

The numeral 4 indicates a stove having a smoke discharge opening 5 that is surrounded by a rectangular upstanding flange 6. The auxiliary heater includes a cast smoke pipe base section 7, the lower end of which is tapered to fit within the ange 7 and form a tight joint therewith. To hold the base section 7 in an upright position within the ange 6, there is secured within and to said base Section, by a screw 8, an L-shaped lug 9 arranged to extend downward through the smoke opening 5 and engage the under side of the top of the stove 4. The upper end of the base section 7 is reduced to receive and hold an ordinary stove pipe section 10. f

In the back of the base section 7 is an outlet port 11 and an inlet port 12 vertically spaced, the latter above the former. A damper 13 is hinged to and within the basev section 7 at the back thereof, between the two ports 11 and 12. This damper, when turned into a horizontal position,4 will close said base section 7 above the outlet port 11 and when turned downward will close said outlet port 1l. An internal flange 14, on the base section 7, is arranged to be engaged by the damper 13, when raised, asa stop and forms a tight joint between said damper and base section.

Attached to the base section 7, above the port 12, is a rearwardly extended horizontal cast shelf 15 in which is formed two laterally spaced outlet openings 16 and two laterally spaced inlet openings 17 located between said outlet openings 16 and the base section 7. Each of the openings 16 and 17 is surrounded by an upstanding flange 18 and 19, respectively. Concentric elbows 2O and 21 connect .the port 11 with the outlet openings 16 and the inlet openings 17 with the port 12, respectively. A pair of laterally spaced inverted U-pipes 22 have their ends telescoped into the llanges l18`and 19 and, together with the elbows 20` and 21, connect the port 11 with thev port 12. Mountedin the pipes 22, at the inlet openings l17, are dampers 23, and which dampers are mounted on a single shaft 24 journaled in open seats in the flanges 19. Itwill be noted, by reference to Fig.V 2, that the pipes -22 are notched to clear the shaft 24 so as to permit the removal of said pipes.

The rightehand end of the Shaft 24 is eX- tended to form a crank-like handle 25, by which the dampers 23 my be simultaneously operated. On the right-hand side of the elbows 20 and 21 is a notched lock plate 26 with which the handle 25 yieldingly engages to hold the dampers 23 in open, closed, or intermediate positions. The damper 13 has its shaft extended to form a weighted handle 27, arranged to hold the damper 13 in either of its extreme positions under the action of gravity. A bracket 28 connects the pipes 22 to the smoke pipe section 10 and holds Said pipes 22 in upright position.

From the above description, itis evident that when the damper 13 is closed, smoke and products of combustion from the stove will travel through the smoke opening 5, port 11, elbow 20, pipes 22, elbow 21, port 12, and base section 7 above the damper 13, to the pipe section 10. It will thus be seen that smokevand products of combustion will be caused to travel a relatively long distance before ente'riY g the pipelO, thus materially increasing the' heating efficiency' of the stove.

the dampers 23 fit sufficiently loose in the pipes 22 as to not entirely cut off the draft from the stove 4 to the pipe 10, and this draft may be controlled, at will, by manipulating the dampers 23. When starting a fire or after putting on new fuel to permit the escape of gasses, the damper 13 is dropped to close the port l1 and open the base section 7, so as to leave a direct draft from the stove to the pipe 10, and at which time, the dampers 23 will also be closed. After the fire is well started and the gas has burned off, the damper 13 may be closed and the dampers 23 set, so that there will be suflicient draft to keep the fire burning to produce the desired amount of heat.

In place of tapering the lower end of the casting 7, in some instances it might be desirable to expand the same so as to telescope onto the flange 6.

What I lclaim is:

1.7An auxiliary heater comprising asmcke pipe section having vertically spaced outlet and inlet ports, outlet and inlet elbows communicating respectively with said outlet and inlet ports, a damper in said base section between said two ports, and a damper-controlled inverted U-pipe connecting said two elbows.

2. An auxiliary heater comprising a smoke pipe section having outlet and inlet ports, outlet and inlet elbows communicating respectively with said outlet and inlet ports, a damper in said base section between said two ports, a plurality of return pipes connecting said two elbows, and simultaneously operative dampers for the return pipe at the inlet` elbow.

3. An auxiliary heater comprising a smoke pipe section having outlet and inlet ports, outlet and inlet elbows communicating respectively with said outlet and inlet ports, a damper in said Vbase section between said two ports. a plurality of return pipes connecting said two elbows, and simultaneously operativeJ dampers for the return pipe at the inlet elbow, said damper in the smoke pipe base section being gravity-held in either of its two extreme positions and the dampers for the return pipes having means for holdl' ing the same in predetermined positions.

fi. An auxiliary heater comprising a cast smoke pipe base section having outlet and inlet ports and also having a horizontal shelf with flanged outlet and inlet openings, concentric elbows connecting the outlet and inlet ports with the outlet and inlet openings, respectively, a damper in said base section between the two ports, an inverted U-pipe having its ends mounted in said flanged openings, and a damper in the U-pipe at the outlet opening.

5. An auxiliary heater comprising a cast smoke pipebase section having outlet and inlet ports and also havingy a horizontal shelf with fianged outlet and inlet openings,

concentrieelbows ,connecting the outlet and inlet ports with the outlet and inlet openings, respectively, a damper in said base section between the two ports, two inverted U-pipes q having their ends mounted in said flanged openings, and dampers in the U-pipes at the inlet openings. Y f

In testimony whereof I affix my signature.

HERMAN c. 'swnNsoN 

